51578102 divided by 664 
We're looking to find how many times 664 goes into 51578102.

Step 1:
If we divide 5 by 664, we get 0 and a remainder of 5.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 5, we end up with 5.
Include the next digit (1) from the dividend after 5, then repeat: 51 / 664

Let's proceed to step 2:
The number 664 fits into 51 0 times, leaving a remainder of 51.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 51 after subtracting 0 from 51.
Grab the next digit (5) from the dividend, add it to 51, then carry on: 515 / 664

Moving on to step 3:
664 can be fit into 515 0 times, resulting in a remainder of 515.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 515 to get 515.
Append the next digit (7) from the dividend to 515 and continue with: 5157 / 664

Advancing to step 4:
664 can be fit into 5157 7 times, resulting in a remainder of 509.
Write down 7 as next digit of the result. 
Result so far: 7.0
Deduct 4648 from 5157 and we're left with 509.
Append the next digit (8) from the dividend to 509 and continue with: 5098 / 664

Moving on to step 5:
If we divide 5098 by 664, we get 7 and a remainder of 450.
The number 7 becomes the next digit in our result. 
Result so far: 77.0
If we subtract 4648 from 5098, we get 450.
Include the next digit (1) from the dividend after 450, then repeat: 4501 / 664

Step 6:
4501 divided by 664 is 6 with a remainder of 517.
Write down 6 as next digit of the result. 
Result so far: 776.0
The remainder is 517 after subtracting 3984 from 4501.
Fetch the next digit (0) from the dividend, attach it to 517 and continue: 5170 / 664

Moving on to step 7:
664 goes into 5170 7 times with a remainder of 522.
Write down 7 as next digit of the result. 
Result so far: 7767.0
Deduct 4648 from 5170 and we're left with 522.
Append the next digit (2) from the dividend to 522 and continue with: 5222 / 664

Let's proceed to step 8:
5222 divided by 664 is 7 with a remainder of 574.
Record the quotient 7 as the next digit in the result. 
Result so far: 77677.0
If we take 4648 away from 5222, we end up with 574.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5740, and continue the process.

Let's proceed to step 9:
When dividing 5740 by 664, we get 8 with a remainder of 428.
The number 8 becomes the next digit in our result. 
Result so far: 77677.8
If we subtract 5312 from 5740, we get 428.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4280, and continue the process.

On to step 10:
When dividing 4280 by 664, we get 6 with a remainder of 296.
Put 6 as the next digit of the answer. 
Result so far: 77677.86
Subtract 3984 from 4280 to get 296.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2960, and continue the process.

Step 11:
664 goes into 2960 4 times with a remainder of 304.
Write down 4 as next digit of the result. 
Result so far: 77677.864
Subtract 2656 from 2960 to get 304.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3040, and continue the process.

Let's proceed to step 12:
664 goes into 3040 4 times with a remainder of 384.
Record the quotient 4 as the next digit in the result. 
Result so far: 77677.8644
Subtract 2656 from 3040 to get 384.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3840, and continue the process.

The final outcome is 77677.8644, with a leftover of 0.00384.